Create method to populate Room db with mock data

[JaeW]

@ijeomaezeonyebuchi Here is the article about and the code repo on pre-populating the db.

7 Pro Tips for Room https://medium.com/google-developers/7-pro-tips-for-room-fbadea4bfbd1

https://gist.github.com/florina-muntenescu/697e543652b03d3d2a06703f5d6b44b5

[JaeW]

Here's another reference since sometimes it helps to have multiple. https://android.jlelse.eu/pre-populate-room-database-6920f9acc870

[BlitheBrandon]

If you need to create mock data, this StackOverflow question/answer has some tools listed. https://stackoverflow.com/questions/591892/tools-for-generating-mock-data